LDT-402 Series Theodolite

The LDT-402 Series represents a significant advancement in precision angle measurement, combining robust construction with intelligent digital features.
This Smart Electronic Theodolite is engineered for surveyors and construction professionals who require reliable, accurate, and efficient data collection in the field.

This Smart Electronic Theodolite features a built-in data collector, eliminating the need for external recording devices and streamlining your workflow.

The LDT-402A Electronic Theodolite includes the following four types:

LDT-402AOL Electronic Theodolite
Theodolite, Bottom: Optical, Top: Laser (Red Beam), Grey Shell Color

LDT-402ALO Electronic Theodolite
Theodolite, Bottom: Laser (Red Beam), Top: Optical, Grey Shell Color

LDT-402ALL Electronic Theodolite
Theodolite, Bottom: Laser (Red Beam), Top: Laser (Red Beam), Grey Shell Color

LDT-402AOO Electronic Theodolite
Theodolite, Bottom: Optical, Top: Optical, Grey Shell Color

The LDT-402E Electronic Theodolite includes the following four types:

LDT-402EOL Electronic Theodolite
Theodolite, Bottom: Optical, Top: Laser (Red Beam), Green Shell Color

LDT-402ELO Electronic Theodolite
Theodolite, Bottom: Laser (Red Beam), Top: Optical, Green Shell Color

LDT-402ELL Electronic Theodolite
Theodolite, Bottom: Laser (Red Beam), Top: Laser (Red Beam), Green Shell Color

LDT-402EOO Electronic Theodolite
Theodolite, Bottom: Optical, Top: Optical, Green Shell Color

LDT-402 Series Theodolite Specifications

Model No.		LDT-402E/402A	LDT-402EL/402AL
Tribrach	Model	Detachable	Detachable
Telescope	Imaging	Erect	Erect
	Magnification	30X	30X
	Objective Aperture	45mm	45mm
	Resolution	3″	3″
	FOV	1°30′	1°30′
	Minimum Focus	1.3m	1.5m
	Multiplication/Additive Constant	100/ 0	100/ 0
	Length	156mm	156mm
Angle Measurement	Measuring Mode	Absolute Encoder	Absolute Encoder
	Minimum Reading	1″/ 5″	1″/ 5″
	Reading Accuracy	2″	2″
	Circle Diameter	71mm	71mm
	Angle Units	360°/ 400gon/ 6400mil	360°/ 400gon/ 6400mil
Compensator	Tilt Sensor	Yes	Yes
	Range	±3′	±3′
Laser Plummet	Wave Length	635nm Red Beam	635nm Red Beam
	Power	1mw	1mw
	Accuracy (1.5m)	±1mm	±1mm
	Laser Grade	ClassⅡ	ClassⅡ
Optical Plummet(Optional)	Magnification	3x	3x
	Field of View	5°	5°
	Focus Range	0.5m—∞	0.5m—∞
Laser Pointer	Wave Length	/	635nm Red
	Power	/	1mW
	Laser range (Day Time)	/	200m
	Laser Coaxial Accuracy	/	≤5″
	Laser Spot Diameter	/	≤2mm/100m
Vial	Plate Vial	30″/ 2mm	30″/ 2mm
	Circular Vial	8’/ 2mm	8’/ 2mm
Display	Dual Face	LED Backlight	LED Backlight
Power	Power Resource	Ni-MH Battery 4.8V 1500 mAh	Ni-MH Battery 4.8V 1500 mAh
	Working Temperature	-20℃～+50℃	-20℃～+50℃
Output	Data output	/	RS232C
	Memory(points)	/	1000